#include <iostream>
using std::cout;
using std::endl;
//全局性的number
int number = 100;

namespace wd
{
//命名空间wd里面的number
int number = 10;
void display()
{
	cout << "wd::display()" << endl;
}
}//end of namespace wd


void test0()
{
    //使用了using编译指令，产生了冲突
 using namespace wd;
	cout << number << endl; //error,有冲突
}


void test(){

}

int main()
{
    test();
    return 0;
}

